(n.) A unruly street demonstration or band of vandalizing miscreants composed of supporters or fans of not the losers, but instead the winners of a political contest or athletic event.
The phenomenon which frequently follows a Laker victory at the Staples Center.

NEWSCASTER: Thousands of dollars in damage and several arrests tonight after Lakers fans celebrating the basketball team's win went out of control and began trashing cars, smashing windows, and pummeling innocent bystanders.
This newest "victor-riot" is the latest in a string of disturbances area police have had to put down.